Below is a list of Lewistown MT zip codes. For your research we have also included Lewistown Area Code, Time Zone, UTC and the local Fergus County FIPS Code. Each Lewistown Montana zip code has a center Longitude / Latitude point (the Lewistown center is -109.42900085449 / 47.063400268555). For your convenience we have also indicated if that zip code in Lewistown observes Daylight Savings time.